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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
Costa Rica, ICE-LMVE (Instituto Costarricense de Electricidad, Laboratorio Metrológico de Variables Eléctricas)
AC voltage (up to the MHz range) ,
AC voltage (up to the MHz range): AC voltage up to 1100 V, meters
:
0.01 V to 1000 V
AC voltmeter, multimeter, multifunction calibrator
Relative expanded uncertainty
:
5.0E1 µV/V to 1.1E4 µV/V
Uncertainty table
{"row_1":{"col_1":"","col_2":"10 Hz","col_3":"45 Hz","col_4":"60 Hz","col_5":"1 kHz","col_6":"10 kHz","col_7":"20 kHz","col_8":"50 kHz","col_9":"100 kHz","col_10":"300 kHz","col_11":"500 kHz","col_12":"1 MHz"},"row_2":{"col_1":"10 mV","col_2":"640","col_3":"480","col_4":"480","col_5":"480","col_6":"480","col_7":"480","col_8":"600","col_9":"1000","col_10":"2050","col_11":"3400","col_12":"4700"},"row_3":{"col_1":"30 mV","col_2":"640","col_3":"313","col_4":"313","col_5":"313","col_6":"313","col_7":"313","col_8":"433","col_9":"1027","col_10":"1567","col_11":"2233","col_12":"4200"},"row_4":{"col_1":"100 mV","col_2":"360","col_3":"150","col_4":"150","col_5":"150","col_6":"150","col_7":"150","col_8":"270","col_9":"630","col_10":"1100","col_11":"1650","col_12":"3150"},"row_5":{"col_1":"300 mV","col_2":"373","col_3":"72","col_4":"72","col_5":"72","col_6":"72","col_7":"72","col_8":"108","col_9":"210","col_10":"687","col_11":"1667","col_12":"2700"},"row_6":{"col_1":"1 V","col_2":"280","col_3":"53","col_4":"53","col_5":"53","col_6":"53","col_7":"53","col_8":"85","col_9":"140","col_10":"500","col_11":"1200","col_12":"2000"},"row_7":{"col_1":"3 V","col_2":"373","col_3":"62","col_4":"62","col_5":"62","col_6":"62","col_7":"62","col_8":"108","col_9":"167","col_10":"475","col_11":"1667","col_12":"2567"},"row_8":{"col_1":"10 V","col_2":"280","col_3":"50","col_4":"50","col_5":"50","col_6":"50","col_7":"50","col_8":"85","col_9":"120","col_10":"335","col_11":"1200","col_12":"1820"},"row_9":{"col_1":"30 V","col_2":"373","col_3":"72","col_4":"72","col_5":"72","col_6":"72","col_7":"72","col_8":"113","col_9":"233","col_10":"1433","col_11":"5733","col_12":"10667"},"row_10":{"col_1":"100 V","col_2":"280","col_3":"58","col_4":"58","col_5":"58","col_6":"58","col_7":"58","col_8":"90","col_9":"175","col_10":"1060","col_11":"4800","col_12":"8800"},"row_11":{"col_1":"300 V","col_2":"–","col_3":"103","col_4":"103","col_5":"103","col_6":"185","col_7":"185","col_8":"–","col_9":"–","col_10":"–","col_11":"–","col_12":"–"},"row_12":{"col_1":"900 V","col_2":"–","col_3":"94","col_4":"94","col_5":"94","col_6":"172","col_7":"172","col_8":"–","col_9":"–","col_10":"–","col_11":"–","col_12":"–"}}
Direct comparison
Frequency : 10 Hz to 1 MHz
Approved on 23 March 2010
Institute service identifier : ICE-LMVE/52201
Frequency ,
Frequency
:
1.00E4 Hz to 2.25E8 Hz
Frequency meter
Relative expanded uncertainty
:
3.0E-11 Hz/Hz
Direct frequecy measurement of its time base
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.3.2
Frequency ,
Frequency
:
1.00E6 Hz to 2.25E8 Hz
General frequency source
Relative expanded uncertainty
:
3.0E-11 Hz/Hz
Direct frequency measurement
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.2.3
AC current ,
AC current up to 100 A: meters
:
1.00E-4 A to 11 A
AC ammeter, multimeter, multifunction calibrator
Relative expanded uncertainty
:
1.1E2 µA/A to 5.8E3 µA/A
Uncertainty table
{"row_1":{"col_1":"","col_2":"10 Hz","col_3":"45 Hz","col_4":"60 Hz","col_5":"1 kHz","col_6":"5 kHz","col_7":"10 kHz"},"row_2":{"col_1":"220 µA","col_2":"318","col_3":"155","col_4":"155","col_5":"155","col_6":"–","col_7":"1359"},"row_3":{"col_1":"2.2 mA","col_2":"298","col_3":"184","col_4":"184","col_5":"184","col_6":"–","col_7":"2536"},"row_4":{"col_1":"2.2 mA","col_2":"225","col_3":"120","col_4":"120","col_5":"120","col_6":"–","col_7":"1359"},"row_5":{"col_1":"22 mA","col_2":"298","col_3":"184","col_4":"184","col_5":"184","col_6":"–","col_7":"2148"},"row_6":{"col_1":"22 mA","col_2":"225","col_3":"120","col_4":"120","col_5":"120","col_6":"198","col_7":"1242"},"row_7":{"col_1":"220 mA","col_2":"298","col_3":"158","col_4":"158","col_5":"158","col_6":"–","col_7":"1113"},"row_8":{"col_1":"220 mA","col_2":"225","col_3":"113","col_4":"113","col_5":"113","col_6":"–","col_7":"932"},"row_9":{"col_1":"2.2 A","col_2":"–","col_3":"292","col_4":"292","col_5":"292","col_6":"–","col_7":"5849"},"row_10":{"col_1":"2.2 A","col_2":"–","col_3":"229","col_4":"229","col_5":"229","col_6":"411","col_7":"5559"},"row_11":{"col_1":"11 A","col_2":"–","col_3":"401","col_4":"401","col_5":"401","col_6":"–","col_7":"2989"},"row_12":{"col_1":"11 A","col_2":"–","col_3":"370","col_4":"370","col_5":"370","col_6":"–","col_7":"2853"}}
Direct comparison
Frequency : 10 Hz to 10 kHz
Approved on 23 March 2010
Institute service identifier : ICE-LMVE/62201
DC current (up to 100 A) ,
DC current meters: low values
:
1.00E-5 A to 11 A
Multimeter
Relative expanded uncertainty
:
4.0E1 µA/A to 8.4E2 µA/A
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded Uncertainty","col_3":"Units"},"row_2":{"col_1":"0.01 mA","col_2":"656","col_3":"µA/A"},"row_3":{"col_1":"0.1 mA","col_2":"102","col_3":"µA/A"},"row_4":{"col_1":"> 0.1 mA","col_2":"107","col_3":"µA/A"},"row_5":{"col_1":"1 mA","col_2":"43","col_3":"µA/A"},"row_6":{"col_1":"> 1 mA","col_2":"77","col_3":"µA/A"},"row_7":{"col_1":"10 mA","col_2":"40","col_3":"µA/A"},"row_8":{"col_1":"> 10 mA","col_2":"117","col_3":"µA/A"},"row_9":{"col_1":"100 mA","col_2":"53","col_3":"µA/A"},"row_10":{"col_1":"> 100 mA","col_2":"204","col_3":"µA/A"},"row_11":{"col_1":"1 A","col_2":"94","col_3":"µA/A"},"row_12":{"col_1":">1 A","col_2":"840","col_3":"µA/A"},"row_13":{"col_1":"11 A","col_2":"404","col_3":"µA/A"}}
Direct comparison
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/32101
Frequency ,
Frequency
:
100 kHz
Local frequency standard
Relative expanded uncertainty
:
5.0E-11 Hz/Hz
Direct frequency measurement of oscillator
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.1.1
Impedance (up to the MHz range) ,
Inductance: self inductance, low values
:
10 mH to 100 mH
Fixed inductor
Relative expanded uncertainty
:
5.0E1 µH/H
Uncertainty table
{"row_1":{"col_1":"","col_2":"Parameter","col_3":"Specifications","col_4":"Expanded uncertainty","col_5":"Units"},"row_2":{"col_1":"10 mH","col_2":"Frequency Current","col_3":"1 kHz 7.7 mA","col_4":"50","col_5":"µH/H"},"row_3":{"col_1":"100 mH","col_2":"Frequency Current","col_3":"1 kHz 1.5 mA","col_4":"50","col_5":"µH/H"}}
Substitution using an LCR meter
Frequency : 1 kHz
Current : 1.5 mA to 7.7 mA
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/43201
AC power ,
AC power and energy: single phase (frequency <= 400 Hz)
:
15 W to 1.20E4 W
Watt-hour meter, wattmeter
Relative expanded uncertainty
:
2.9E2 µW (VA)-1
Comparison
Frequency : 60 Hz
Applied voltage : 120 V and 240 V
Current : (0.25 A at 120 V and 0.3 A at 240 V) to 50 A
Power factor : 1, 0.5 lead, 0.5 lag
Approved on 23 March 2010
Institute service identifier : ICE-LMVE/71101
DC voltage (up to 1100 V) ,
DC voltage meters: intermediate values
:
1.00E-3 V to 0.01 V
DC voltmeter, multimeter
Relative expanded uncertainty
:
3.8 µV/V to 4.2E2 µV/V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty","col_3":"Units"},"row_2":{"col_1":"> 0.001 V DC","col_2":"416","col_3":"µV/V"},"row_3":{"col_1":"0.01 V DC","col_2":"48","col_3":"µV/V"},"row_4":{"col_1":"> 0.01 V DC","col_2":"48","col_3":"µV/V"},"row_5":{"col_1":"0.1 V DC","col_2":"12","col_3":"µV/V"},"row_6":{"col_1":"> 0.1 V DC","col_2":"12","col_3":"µV/V"},"row_7":{"col_1":"1 V DC","col_2":"5.8","col_3":"µV/V"},"row_8":{"col_1":"> 1 V DC","col_2":"5.8","col_3":"µV/V"},"row_9":{"col_1":"10 V DC","col_2":"3.8","col_3":"µV/V"},"row_10":{"col_1":"> 10 V DC","col_2":"3.8","col_3":"µV/V"},"row_11":{"col_1":"100 V DC","col_2":"5.5","col_3":"µV/V"},"row_12":{"col_1":">100 V DC","col_2":"5.5","col_3":"µV/V"},"row_13":{"col_1":"1000 V DC","col_2":"7","col_3":"µV/V"}}
Direct comparison
Measurement lower limit for values > 0.001 V
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/12201
DC resistance ,
DC resistance standards and sources: low values
:
0.1 Ω to 1.00E8 Ω
Fixed resistor, resistance box
Relative expanded uncertainty
:
1.0E1 µΩ/Ω to 4.7E2 µΩ/Ω
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty","col_3":"Units"},"row_2":{"col_1":"0.1 Ω","col_2":"402","col_3":"µΩ/Ω"},"row_3":{"col_1":"1 Ω","col_2":"53","col_3":"µΩ/Ω"},"row_4":{"col_1":"> 1 Ω","col_2":"53","col_3":"µΩ/Ω"},"row_5":{"col_1":"10 Ω","col_2":"18","col_3":"µΩ/Ω"},"row_6":{"col_1":"> 10 Ω","col_2":"50","col_3":"µΩ/Ω"},"row_7":{"col_1":"100 Ω","col_2":"16","col_3":"µΩ/Ω"},"row_8":{"col_1":"> 100 Ω","col_2":"14","col_3":"µΩ/Ω"},"row_9":{"col_1":"1 kΩ","col_2":"10","col_3":"µΩ/Ω"},"row_10":{"col_1":"> 1 kΩ","col_2":"14","col_3":"µΩ/Ω"},"row_11":{"col_1":"10 kΩ","col_2":"10","col_3":"µΩ/Ω"},"row_12":{"col_1":"> 10 kΩ","col_2":"14","col_3":"µΩ/Ω"},"row_13":{"col_1":"100 kΩ","col_2":"10","col_3":"µΩ/Ω"},"row_14":{"col_1":"> 100 kΩ","col_2":"30","col_3":"µΩ/Ω"},"row_15":{"col_1":"1 MΩ","col_2":"16","col_3":"µΩ/Ω"},"row_16":{"col_1":"> 1 MΩ","col_2":"119","col_3":"µΩ/Ω"},"row_17":{"col_1":"10 MΩ","col_2":"49","col_3":"µΩ/Ω"},"row_18":{"col_1":"> 10 MΩ","col_2":"468","col_3":"µΩ/Ω"},"row_19":{"col_1":"100 MΩ","col_2":"398","col_3":"µΩ/Ω"}}
Direct comparison
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/21101
DC current (up to 100 A) ,
DC current sources: low values
:
1.00E-5 A to 10 A
Multifunction calibrator, current generator
Relative expanded uncertainty
:
2.3E1 µA/A to 4.2E2 µA/A
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded Uncertainty","col_3":"Units"},"row_2":{"col_1":"0.01 mA","col_2":"82","col_3":"µA/A"},"row_3":{"col_1":"0.1 mA","col_2":"26","col_3":"µA/A"},"row_4":{"col_1":"> 0.1 mA","col_2":"59","col_3":"µA/A"},"row_5":{"col_1":"1 mA","col_2":"23","col_3":"µA/A"},"row_6":{"col_1":"> 1 mA","col_2":"59","col_3":"µA/A"},"row_7":{"col_1":"10 mA","col_2":"23","col_3":"µA/A"},"row_8":{"col_1":"> 10 mA","col_2":"70","col_3":"µA/A"},"row_9":{"col_1":"100 mA","col_2":"35","col_3":"µA/A"},"row_10":{"col_1":"> 100 mA","col_2":"167","col_3":"µA/A"},"row_11":{"col_1":"1 A","col_2":"97","col_3":"µA/A"},"row_12":{"col_1":">1 A","col_2":"235","col_3":"µA/A"},"row_13":{"col_1":"10 A","col_2":"418","col_3":"µA/A"}}
Direct comparison
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/31101
DC voltage (up to 1100 V) ,
DC voltage sources: low value ranges
:
0.01 V to 1000 V
DC voltage source, multifunction calibrator
Relative expanded uncertainty
:
4.9 µV/V to 1.6E2 µV/V
Uncertainty table
{"row_1":{"col_1":"","col_2":"Expanded uncertainty","col_3":"Units"},"row_2":{"col_1":"0.01 V DC","col_2":"161","col_3":"µV/V"},"row_3":{"col_1":"0.1 V DC","col_2":"21","col_3":"µV/V"},"row_4":{"col_1":"> 0.1 V DC","col_2":"21","col_3":"µV/V"},"row_5":{"col_1":"1 V DC","col_2":"6.2","col_3":"µV/V"},"row_6":{"col_1":"> 1 V DC","col_2":"6.2","col_3":"µV/V"},"row_7":{"col_1":"10 V DC","col_2":"4.9","col_3":"µV/V"},"row_8":{"col_1":"> 10 V DC","col_2":"4.9","col_3":"µV/V"},"row_9":{"col_1":"100 V DC","col_2":"6.4","col_3":"µV/V"},"row_10":{"col_1":">100 V DC","col_2":"6.4","col_3":"µV/V"},"row_11":{"col_1":"1000 V DC","col_2":"15.6","col_3":"µV/V"}}
Direct comparison
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/11201
Impedance (up to the MHz range) ,
Impedance (up to the MHz range), capacitance, capacitance and dissipation factor for dielectric capacitors
:
10 pF to 1000 pF
Fixed capacitor, capacitance box
Relative expanded uncertainty
:
5.0E1 µF/F
Uncertainty table
{"row_1":{"col_1":"","col_2":"Parameter","col_3":"Specifications","col_4":"Expanded uncertainty","col_5":"Units"},"row_2":{"col_1":"10 pF","col_2":"Frequency
Voltage","col_3":"1 kHz 15 V","col_4":"50","col_5":"µF/F"},"row_3":{"col_1":"100 pF","col_2":"Frequency
Voltage","col_3":"1 kHz 15 V","col_4":"50","col_5":"µF/F"},"row_4":{"col_1":"1000 pF","col_2":"Frequency
Voltage","col_3":"1 kHz 1.5 V","col_4":"50","col_5":"µF/F"}}
Substitution
Frequency : 1 kHz
Voltage : 1.5 to 15 V
Approved on 21 April 2016
Institute service identifier : ICE-LMVE/42201
Time interval ,
Time interval
:
3.28E4 Hz
Period meter
Relative expanded uncertainty
:
2.0E-10 s/s
Direct frequency measurement of internal quartz oscillator
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 3.3.1
Frequency ,
Frequency
:
1.00E4 Hz to 1.00E5 Hz
General frequency source
Relative expanded uncertainty
:
3.0E-7 Hz/Hz
Direct frequency measurement
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.2.1
Frequency ,
Frequency
:
1.00E5 Hz to 1.00E6 Hz
General frequency source
Relative expanded uncertainty
:
3.0E-8 Hz/Hz
Direct frequency measurement
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.2.2
Frequency ,
Frequency
:
1.00E4 Hz to 2.25E8 Hz
Frequency counter
Relative expanded uncertainty
:
3.0E-11 Hz/Hz
Direct frequecy measurement of its time base
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.3.1
Frequency ,
Frequency
:
10 MHz
Local frequency standard
Relative expanded uncertainty
:
3.0E-11 Hz/Hz
Direct frequency measurement of oscillator
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.1.4
Frequency ,
Frequency
:
5 MHz
Local frequency standard
Relative expanded uncertainty
:
3.0E-11 Hz/Hz
Direct frequency measurement of oscillator
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.1.3
Frequency ,
Frequency
:
1 MHz
Local frequency standard
Relative expanded uncertainty
:
3.0E-11 Hz/Hz
Direct frequency measurement of oscillator
Averaging time : 1 s to 86400 s
Gate time : 1 s
Number of measurements : 259200
Signal amplitude (V rms) : < 5 V into 50 Ω and 1 MΩ
Approved on 02 December 2014
Institute service identifier : ICE-LMVE/TF 2.1.2
